How to add label on arc of this graph?

Question

In a previous question I enjoyed a beautifull graph How improve tikZ graphs arrows rendering?

How can I add label on arcs produced by:

\draw[arrow] (NodeName)--(OtherNodeName);

Answer 1

You simply add a node before the semi colon:

References:

• To select the position of the node label see Moving a label along the path

Code:

\documentclass{article}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
\draw[->, ultra thick, blue] (0,0)--(1,2) node [pos=0.5, above, red, sloped] {label};
\end{tikzpicture}
\end{document}